451644012 has 30 divisors (see below), whose sum is σ = 1180687508. Its totient is φ = 150547896.

The previous prime is 451643989. The next prime is 451644013. The reversal of 451644012 is 210446154.

451644012 is a `hidden beast` number, since 4 + 5 + 1 + 644 + 0 + 12 = 666.

It is a super-2 number, since 2×451644012² = 407964627150912288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (451644013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 696658 + ... + 697305.

Almost surely, 2^451644012 is an apocalyptic number.

It is an amenable number.

451644012 is an abundant number, since it is smaller than the sum of its proper divisors (729043496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451644012 is a wasteful number, since it uses less digits than its factorization.

451644012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393979 (or 1393968 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 451644012 is about 21251.9178428677. The cubic root of 451644012 is about 767.2414996636.

The spelling of 451644012 in words is "four hundred fifty-one million, six hundred forty-four thousand, twelve".